Here, a calcite crystal is struck with a laser operating at 445 nanometers, fluorescing and displaying properties of birefringence. Unlike the standard picture of light breaking into individual ...

You can use chocolate, cheese, or even marshmallows to microwave at the speed of light. Your microwave has its wavelength listed somewhere, and it's easy to multiply the rest. Also, you can still eat ...

The speed of light is a fundamental constant, approximately 299,792,458 meters per second. It's the same for all observers and hasn't changed measurably over billions of years. Nothing can travel ...